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A meristem is the tissue in most plants containing undifferentiated cells (meristematic cells), found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of the plant and keep the plant growing. The shoot apical meristem (SAM) gives rise to organs like the leaves and flowers, while the root apical meristem (RAM) provides the meristematic cells for the future root growth.
It is common to see photomicrographs of onion root cells when demonstrating how cell division takes place in plants. Onions have larger chromosomes than most plants and stain dark.The chromosomes are easily observed through a compound light microscope.The cells pictured below are located in the apical meristem of the onion root. The apical meristem is an area of a plant where cell division takes place at a rapid rate.Phases of plant cells division: 1) Interphase is considered the first and last stage of plant cell division.nions have larger chromosomes than most plants and stain dark. The chromosomes are easily observed through a compound light microscope. The cells pictured below are located in the apical meristem of the onion root. The apical meristem is an area of a plant where cell division takes place at a rapid rate.